Messages with the words 'Who Killed Daphne?' and another reading 'House of Impunity' were projected on the facade of the Auberge de Castille on Thursday night, as the compilation of evidence against the alleged murderers of Daphne Caruana Galizia continued.
The event was organised by a pressure group calling itself Kenniesa, supported by Occupy Justice.
They said their purpose was to reinforce their call for answers and to make a point that there’s no accountability in Castille.
Malta has been criticised in European Parliament debates for a culture of impunity which culminated in the car bomb murder of Ms Caruana Galizia on October 16.
Court proceedings against three men accused of the murder continued in court on Thursday, but no one has had been accused of commissioning the murder.
A small group of people, including Partit Demokratiku MPs were present at Castille Square.
Two policemen appeared to approach the organisers and then were seen making phone calls. The activists left after a short time.
Reacting on Facebook, Valletta 2018 Foundation chairman Jason Micallef slammed the "few dozen" who "think they can humiliate the Maltese people with their actions."